exam Maths Puzzle Numerical Ability

Graph.

f(x) = 2x + 4

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exam Other Question

6y + 8x = -432

i dont know how to find the x int. and the y int. or the slope in this problem how do i graph x squared - 6x + y squared - 14y is less than or equal to -54. We have to graph it in order to find the solution between that equation and x squared + y squared is l